An Oslo court delivered a four-year prison sentence on Monday to the son of Norwegian Crown Princess Mette-Marit, finding him guilty of two rape counts alongside 32 further offences in what has become a notable embarrassment for the Nordic nation's royal household.

The conviction represents one of the most significant legal troubles to befall the Norwegian monarchy in recent times, with the case drawing considerable public and media attention throughout the proceedings.

The court's decision brings closure to a high-profile criminal matter that has cast scrutiny on the royal family during the legal process, which unfolded across multiple hearings in the Norwegian capital.